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The spin-dependent quark beam function at NNLO

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arxiv 1704.05457 v2 pith:PENVWEIV submitted 2017-04-18 hep-ph nucl-th

Radja Boughezal , Frank Petriello , Ulrich Schubert , Hongxi Xing This is my paper · ORCID
classification hep-phnucl-th
keywords beamfunctionnnlocollisionspolarizedquarkanticipateapplications
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abstract

We calculate the beam function for longitudinally-polarized quarks through next-to-next-to-leading order (NNLO) in QCD perturbation theory. This is the last missing ingredient needed to apply the factorization theorem for the $N$-jettiness event-shape variable in polarized collisions through the NNLO level. We present all technical details of our derivation. As a by-product of our calculation we provide the first independent check of the previously-obtained unpolarized quark beam function. We anticipate that our result will have phenomenological applications in describing data from polarized collisions.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Jet Charge with Global Event Shapes: Probing Quark Flavor Dynamics

    hep-ph 2025-12 unverdicted novelty 7.0 of 10

    A factorization theorem is derived for the joint measurement of 1-jettiness and jet charge in DIS, introducing a new universal charged jet function that enhances quark flavor separation in initial-state PDFs and probe...

  2. Triple real-emission contribution to the zero-jettiness soft function at N3LO in QCD

    hep-ph 2024-12 conditional novelty 6.0 of 10

    The paper provides the technical derivation and cross-checks of the triple-real-emission piece of the N3LO zero-jettiness soft function, confirming the result announced in arXiv:2409.11042.

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